#include <iostream>
using std::cout;
using std::endl;

int main()
{
	cout << "n e" << endl << "- -----------" << endl
		 << "0 1" << endl << "1 2" << endl << "2 2.5" << endl
		 << "3 2.666666667" << endl << "4 2.708333333" << endl
		 << "5 2.716666667" << endl << "6 2.718055556" << endl
		 << "7 2.718253968" << endl << "8 2.718278770" << endl
		 << "9 2.718281526" << endl;
	return 0;
}
